How about watching a two-hour movie about a woman walking? Or visiting the National Museum—how many times have you been there? Maybe a lecture on the three-body problem at the astronomy institute? Or one about a building that was demolished several years ago (in Polish, of course)? If you're still interested in spending your time in the most "boring" way possible (according to extroverts), you're welcome to join. I usually try to attend events like this at least once a week—maybe I wouldn't mind some company.